Modern Database Management
13th Edition
ISBN: 9780134773650
Author: Hoffer
Publisher: PEARSON
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Textbook Question
Chapter 6, Problem 6.1RQ
Define each of the following terms:
- dynamic view
- correlated subquery
- materialized view
- base table
- Join
- equi-join
- self join
- outer join
- virtualized table
Expert Solution
Program Plan Intro
(a)
Define Dynamic View.
Explanation of Solution
Dynamic view is not a temporary table and its definition is stored in the system catalog. The content of this view is materialized as a result of an SQL query that uses the view.
Expert Solution
Program Plan Intro
(b)
Define Correlated Subquery.
Explanation of Solution
In SQL, Correlated subquery is a subquery that processes the inner query depending on the data from the outer query.
Expert Solution
Program Plan Intro
(c)
Define Materialized View.
Explanation of Solution
Materialized view is different from the dynamic view. It is stored on a disk and is refreshed when used or at some intervals. Copies of data is created in the same way as dynamic view.
Expert Solution
Program Plan Intro
(d)
Define Base Table.
Explanation of Solution
Base Table is a table from relational data model that contains the inserted raw data. These tables are correspond to those relations which are identified in the conceptual schema of database.
Expert Solution
Program Plan Intro
(e)
Define Join.
Explanation of Solution
Join is a relational operation that is used to combine two tables with a common domain into a single view or table.
Expert Solution
Program Plan Intro
(f)
Define Equi Join.
Explanation of Solution
Equi-join is a form of join in which the joining is performed on the basis of the equality between values in the columns that are common. Those common columns appear in the result table redundantly.
Expert Solution
Program Plan Intro
(g)
Define Self Join.
Explanation of Solution
Sometimes a join requires match of rows in a table with other rows in that same table which means joining of table with itself. This is known as self join.
Expert Solution
Program Plan Intro
(h)
Define Outer Join.
Explanation of Solution
Outer join is a form of join in which those rows are not included in the resulting table that do not have similar values in the common columns.
Expert Solution
Program Plan Intro
(i)
Define Virtualized Table.
Explanation of Solution
Virtualized tables are not maintained as the tables with real data. These are constructed automatically as the requirement of a DBMS.
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EMPLOYEES(Eno, Ename, Zip, Hdate)
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da
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عرفنه شنو الحل
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e u
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عرفته شنو الحل
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Chapter 6 Solutions
Modern Database Management
Ch. 6 - Define each of the following terms: dynamic view...Ch. 6 - Match the following terms to the appropriate...Ch. 6 - Prob. 6.3RQCh. 6 - Prob. 6.4RQCh. 6 - Prob. 6.5RQCh. 6 - Explain the relationship between EXISTS and...Ch. 6 - Prob. 6.7RQCh. 6 - Under what conditions can a UNION clause be used?Ch. 6 - Prob. 6.9RQCh. 6 - Explain why it is necessary to limit the kinds of...
Ch. 6 - Describe a set of circumstances for which using a...Ch. 6 - Prob. 6.12RQCh. 6 - Prob. 6.13RQCh. 6 - Prob. 6.14RQCh. 6 - Prob. 6.15RQCh. 6 - Prob. 6.16RQCh. 6 - Prob. 6.17RQCh. 6 - Prob. 6.18RQCh. 6 - Prob. 6.19RQCh. 6 - List for advantages of SQL-invoked routines.Ch. 6 - Prob. 6.21RQCh. 6 - Prob. 6.22RQCh. 6 - Prob. 6.23RQCh. 6 - This chapter discusses the data dictionary views...Ch. 6 - Write an SQL query to answer the following...Ch. 6 - Write SQL retrieval commands for each of the...Ch. 6 - Write an SQL query to answer the following...Ch. 6 - Write SQL queries to answer the following...Ch. 6 - Write SQL queries to answer the following...Ch. 6 - Write an SQL query to answer the following...Ch. 6 - Prob. 6.31PAECh. 6 - Prob. 6.32PAECh. 6 - Prob. 6.33PAECh. 6 - What do you need to do if a tutor signs up and...Ch. 6 - Prob. 6.35PAECh. 6 - Write the SQL query to find any tutors who have...Ch. 6 - Prob. 6.37PAECh. 6 - Write an SQL query to determine the total number...Ch. 6 - Prob. 6.39PAECh. 6 - Prob. 6.40PAECh. 6 - Prob. 6.41PAECh. 6 - Prob. 6.42PAECh. 6 - Prob. 6.43PAECh. 6 - Which tutor needs to be reminded to tum in...Ch. 6 - Prob. 6.45PAECh. 6 - Write an SQL query to list all product line names...Ch. 6 - Modify to include only those product lines the...Ch. 6 - Prob. 6.48PAECh. 6 - Prob. 6.49PAECh. 6 - Write an SQL query to display the order number,...Ch. 6 - Prob. 6.51PAECh. 6 - Prob. 6.52PAECh. 6 - Prob. 6.53PAECh. 6 - Prob. 6.54PAECh. 6 - Prob. 6.55PAECh. 6 - Prob. 6.56PAECh. 6 - Prob. 6.57PAECh. 6 - Prob. 6.58PAECh. 6 - Write an SQL query to list each customer who...Ch. 6 - Prob. 6.60PAECh. 6 - Modify Problem and Exercise 6-60 so that the list...Ch. 6 - Prob. 6.62PAECh. 6 - Prob. 6.63PAECh. 6 - Prob. 6.64PAECh. 6 - Prob. 6.65PAECh. 6 - Prob. 6.66PAECh. 6 - Prob. 6.67PAECh. 6 - Prob. 6.68PAECh. 6 - Prob. 6.69PAECh. 6 - Prob. 6.70PAECh. 6 - Prob. 6.71PAECh. 6 - Rewrite your answer to Problem and Exercise 6-71...Ch. 6 - Display the customer ID, name, and order ID for...Ch. 6 - Prob. 6.74PAECh. 6 - Prob. 6.75PAECh. 6 - Prob. 6.76PAECh. 6 - Prob. 6.77PAECh. 6 - Prob. 6.78PAECh. 6 - Prob. 6.79PAECh. 6 - Write an SQL query to list the order number,...Ch. 6 - Prob. 6.81PAECh. 6 - Prob. 6.82PAECh. 6 - Prob. 6.83PAECh. 6 - Prob. 6.84PAECh. 6 - Prob. 6.85PAE
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